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posted May 20 '11 at 04:01

Jonnala%20Kotesh%20Kumar's gravatar image

Jonnala Kotesh Kumar
11

Downfield carbon paired with a upfield proton

Dear sirs I have a natural product whose two carbon resoances are appearinga t 46 and 56 ppm but theirs proton resoanances are appearinga at 0.80 and 0.83 ppm respectively. I am unable to understand how there could be a downfield carbon (oxygenated carbon) is paird up with a upfield proton. I request your expert answer. Thanks in advance.

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fixed typos and address

posted May 23 '11 at 15:05

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
5771

Downfield carbon paired with a upfield proton

Dear sirs sirs and madams, I have a natural product whose two carbon resoances are appearinga t appearing at 46 and 56 ppm but theirs proton resoanances are appearinga appearing at 0.80 and 0.83 ppm respectively. I am unable to understand how there could be a downfield carbon (oxygenated carbon) is paird up with a upfield proton. I request your expert answer. Thanks in advance.

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